Ok so looking at all the replies ,
lets take 5 troops out of m3 and put them in c47
so we will have m3 with 5 troops (bcuz they are more sneaky)
and c47s with 15 troops , so they get be used more often and add an other dimension to the defenders problems
(either spot them early and prevent troop drop , or chase after 15 troops on chute or running...)
please note that usally m3 can drive up to maproom and let the troops run which is giving a very very short time to react for defenders once the troops are released next to or really near to the map room , where as c47 ( even it lands close by to maproom) troops has a lot more exposure until they reach to the maproom (time spend on chute + time spend running to maproom)...